Reinforcement concrete slab

[D09]

Hello

I am going to install a wood boiler weighing about 800kg and a 4m3 tank next to each other.

The base slab is 10cm and reinforced.

Do I need to cast a reinforced shelf about 5 - 10 cm to make it hold?

 

[Gabbe1]

I don't think so.
I guess the tank is quite large, and if you calculate the weight per unit area, it probably isn't that much.

As long as the concrete slab has good support from underneath, it can handle a lot of load.

 

[corre]

if the tank is to be placed against an outer wall, it might be a good idea to check the outside of the wall/slab to ensure there are no ground settlements there. there should be a sufficiently dimensioned edge beam there, but if it is an old garage, for example, they might have been stingy with it.

 

[D09]

If the tank is to be placed against an outer wall, it might be a good idea to check the outside of the wall/foundation to ensure there are no ground settlements there.
There should be a properly sized edge beam there, but if it's an old garage, for example, they might have skimped on that.

The tank will be placed against an inner wall approximately 2-3 meters in on the foundation, the boiler against the outer wall/inner wall about 2 meters in from one wall and next to the other outer wall.

 

[corre]

Sounds like good conditions then.
How will you insulate under the tank?
If it has, for example, 4 or 6 legs that it stands on, you might need to reinforce or install some form of weight distributor on the legs, like a plate or smaller beam that distributes the load over a larger area.

Is there any recommendation from the boiler manufacturer regarding a base?
Some recommend a 10cm plinth to make the boiler heights reasonable.

 

[D09]

Sounds like good conditions then. How will you insulate under the tank? If it has, for example, 4 or 6 legs that it stands on, you might need to reinforce or install some form of load distributor on the legs, such as a plate or smaller beam that distributes the load over a larger area.

Is there any recommendation from the boiler manufacturer regarding a plinth? Some recommend a 10cm base so that the boiler heights make sense.

I actually don't know about the insulation underneath, it’s a rectangular Husqvarna. Haven't received a response on how it should be set up.

I suppose if you place it on foam, it will sink over time?

How is it usually insulated underneath?

Otherwise, the underfloor heating goes underneath he he

Regarding the boiler, it had "feet" and no requirement for a plinth has been mentioned, but I will double-check

 

[Gabbe1]

It should be fine to place it on a piece of cellplast, provided that the bottom of the tank is completely flat, of course. Again, you can calculate the pressure/unit area, and even without knowing the dimensions of the tank, I am quite sure that the surface pressure will be significantly lower than the pressure under the feet of an adult person.

 

[D09]

The boiler supplier responded that no reinforcement is needed under the boiler or tank, and usually, the tank comes with feet to allow for insulation underneath.

Will see what the tank supplier says.

 

[D09]

It should be fine to place it on a piece of foam board, provided that the bottom of the tank is completely flat, of course. Again, you can calculate the pressure per unit area, and without knowing the dimensions of the tank, I am quite sure that the pressure will be considerably lower than the pressure under the feet of an adult person.

So if the tank has feet, do you need to have a board on top of the foam board?

Would Osb work in that case, or is a sturdy construction board needed?

How much can you usually raise with the feet?

 

[Gabbe1]

If the tank has four feet, then there will be over a ton on each one, I would rather cut off the feet to get a completely flat surface against the cellplast.

 

[D09]

The tank had a flat bottom